B1479 Toyota Flow Sensor Circuit #FIX#

One of the Toyota/Lexus A/C common issue the compressor flow sensor stop working and error code B1479, this video showing how you can easy fix it, start your resistor amount 700k ohm, and go up and down until get stable continue compressor works with no disconnecting

[johnart]

I was having similar issues. This method works, however, it causes greater fuel consumption and also causes the car to jump when moving from the stoplight. After a while, I got tired of both experiences and decided I want the original fix. I had the section where the flow sensor is attached, removed. Two ten bolts hold that section on the compressor. After removing, I used WD-40 to clean the holes using a small wire to remove oxidation from inside the holes. After ensuring that the liquid flows freely, I cleaned it thoroughly and bolted it back on the compressor and it worked perfectly. The fuel economy improved and there was no more jumping when moving from a stop or the traffic stoplights when the a/c is running. All this time that was the problem, that section needed clearing.

If the holes inside that section are blocked by oxidation, the flow sensor will never work properly because the sensor senses the flow of fluid through those small holes just beneath where the flow sensor is attached. For some Toyota vehicles, there is no need to remove the compressor to remove that section, however, the gas must be extracted from the compressor first.

[westernapache]

It's easier to just stick a small neodymium magnet to the snap ring that holds the sensor in. If the compressor doesn't come on, try flipping the magnet/polarity. Two problems that happen with these compressors - it gets corrosion underneath the sensor and the magnet in the sensor gets weak. A stronger magnet on top of the sensor usually fixes it. Try it!

[juanvicentemedina]

Have You test the solenoides on those compressors?.

[amysadowski]

Do you have a wire diagram show what color wire is what? I’m guessing the 3 wires are 5V power, ground and the analog signal for flow. Is the resistor going between the analog signal and ground to give the a/c amp a voltage between 3.8 and 4.2. Won’t that signal always be locked in? I thought the signal was supposed to modulate.

[fahrizaqeel]

Flow sensors are available to fix this issue. I replaced the Dorman flow sensor on my 2014 Toyota camry AC compresser and it works fine now. It is a bit hard to remove the old flow sensor but it works.

[UsmanUsman-rtsy]

Sir Toyota Avalon 2014 flow sensor ohm voltage name please 🙏

[neil]

Thanks for the fix. It worked for a 2014 Toyota Avalon BUT ... it only works for the time car is running. When I turn the car off and back on it needs to be reset under the hood. Do you have a fix for keeping it on all of the time? I really appreciate your help.

[tareqiraq]

Possible way of connecting resistance between wires? Possible clarification of the colors of the wires..with thanks

[Mac-mucs]

Does this trick the compressor into running full time all the time?

[archselarchitects]

I have a Toyota Allion 2012 since 2015, and I hv been replacing the solenoid each and every year which became painful for me. My compressor model is DENSO (5SE09C). For God sake, give me a solution.

[autoservice]

hi can wiringdiagram fron this. thank

[Ab-uwom]

What about in v6 engine like 2012 Toyota Highlander

[احمد-تزز]

Hi i do same but its not working
Camry 2013 4cy
Wen i put resistor it heat up

[JoesAutoElectric]

There's a right way and a wrong way to perform repairs....This is the latter.